Ford Wiring/Electrical :: 1999 F150 - Battery Light Came On
May 2, 2013
I have a 1999 Ford F150 6 cyl. 4.2, 2 WD with 160,000 miles. Replaced the battery May 2010.
Today battery light came on. Battery gauge did not look like it was discharging. Had battery checked they said it was a little low but OK. Then they continued test and tried to check alternator, test stopped and they said something wrong with alternator most likely.
I took alternator out and had it bench tested. They said it was OK, putting out 98 amp on 95 amp alternator. They said check wires, grounds, harness, connections. Checked connections and wires as much as possible, reinstalled alternator, light still on.
Have not checked fuses yet. Was told to start vehicle, disconnect positive battery cable and if engine continued to run alternator was good, if cut off alternator was bad and to replace. Should I try this and is it true?
What is the part on the fire wall that is between the alternator and the battery that the wire connection runs through? Can it be bench tested/checked?
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Start out, drive about 20 minutes, get on the Interstate and the battery light comes on 2008 F 150 5.4L 4X4 - 57K miles..... get to my destination, went about 20 miles, turn around to come home, without turning the truck off because of the battery light being on and I notice the charging gauge drifting down to the left, get back on the Interstate and the wipers are slowing down and lights on the dash are dimming.....go around 15 more minutes I lose all lights on dash, wipers, defroster everything, charging gauge is now pegged all the way down to the left and the truck is starting to act up running like crap so I barely make it off the Interstate and call a flatbed, I guess I was about an hour into the trip ..... battery is only about a year old and it started fine that morning and the day before when it was about 12 degrees ...... dealership had the truck, just gave me a call and said they can't find anything ?? ..... never a days problem since I bought it new in late 07' ....
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My neighbor's kids truck battery drains from full charge to "no start" in 1-2 days. 1999 Ford F-150 w/ 4.6L engine. He has already.....
1) Replaced the Battery.
2) Replaced the GEM module.
3) Replaced the Turn Signal Relay.
He did all this before I looked at it....
I checked the following....
1) Truck off, doors closed, hood open... Amp meter shows 3.6 amp draw. When 1st hooked up, shows 4.2 amps... after a while drops to 3.6.
2) To isolate the draw, we pulled fuses while checking current draw at battery.
a) Under Dash fuse Panel. (Yes, with door closed) We remove fuse #15 "stop lamp switch, speed control, brake shift interlock, ABS, PCM,GEM, RABS test connector". (Really... couldn't be more stuff?)
b)Under the hood is another fuse box (drivers side). We remove Fuse #103. "Junction Block Battery Feed".
3) Found that if we remove the #15 fuse under the dash with the door opens, all interior lights flash on/off at about 1 second intervals... weird.
4) Again, another weird one... with the fuse #15 removed and door closed, the "ABS" indicator and some other indicators and dash lights are staying partially lit... not fully lit.
5) The only "aftermarket" stuff i can see is a dealer installed trailer brake system. Wiring looks professional and disconnecting it does not remove the amperage drain.
I'm hoping that one of you wizards will give me the "slam dunk"... if this happens, it must be that. Can I be so lucky? And, yes. I have my own '06 F-150 that i absolutely love. 6-cyl., manual trans, stripped down without even power door locks... my kinda technology.
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Problem with my 2006 F150 5.4 4x4... Voltmeter spikes, battery light comes on, grinding noise as 4x4 engages on its own then everything returns to normal after about 60 seconds. Took to Ford who replaced the alternator and battery, still doing it so they replaced the alternator again...they checked the wiring and replaced some other misc parts and don't know what the problem is. The problem occurs once every few days, after only a few minutes or after a few hours, completely random.
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I have a 1998 Ford F-150. It has an issue with starting sometimes. The truck won't start with a fully charged battery but when I hook it up to a charger, the truck starts normally. It was going to get the wheels aligned today and when the mechanic went to drive it off the ramp, it wouldn't start. I told him to put a charger on the battery and it started right up. Without the charger it just cranked over and wouldn't start. It doesn't do this every time I go to start it only occasionally. The mechanic had no idea what the problem was and has never heard of this kind of situation. I'm assuming it is an electrical problem but I'm not an expert with engines. The battery was fully charged at the shop and the battery is a year old.
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My center brake light went out a month ago. Thought it was the bulb so replaced that, still didn't work. Checked the fuse and its not broken so my guess was electrical?
Hasn't come on once that I know of but I was randomly walking behind my truck and the light was on. Truck was off lights were off and key wasn't in the ignition.
Went and turned my truck on and turned the lights on and the cbl stayed on. When I switched my lights off it went out and stayed out.
Now I'm definitely thinking wiring but not sure where to start fixing?
Oh and it's a 1990 F150 XLT
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I've searched all over and can't seem to find the answer. When I pull the tail light out of my 12 F150 there is a blue/wht wire and a black wire going to the back up light. I assume the blue wire is the positive and black is the ground. Is that correct?
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I have an 06 F150 XLT and lately the map lights blink when starting and driving. This does not occur every time but it sure is a problem when driving at night. What is causing this and hopefully a minor repair.
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Why the parking brake light in my dash stays on, 2004 F150. Fluid in master cylinder is full, has no signs of leaks anywhere.
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I've been trying to trace down a issue with the airbag warning light flashing. The seatbelt light is flashing also. The airbag code is 53. If i search it i get the front crash sensor..I replaced it with a new sensor and pigtail. Other than that the search leads me to believe it could be anything.
I've checked and clean every connection that i could find. I haven't removed the center console yet to check the module. I did buy the truck last fall as a winter/work truck. The issue started a couple of months after i started driving it. Not sure if the module would just go bad.
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My fuel gauge indicates empty at all times. The first suggestion I received was to replace the sending unit in the gas tank. I did that but the gauge still indicates empty.
I tried the HEC Dealer test mode and I now know that FUEL reads 255. Which should be an 'open' state. The connector near the fuel tank does appear to be making good contact, so my suspicion is a broken wire somewhere between the rear of the truck and the front.
I tried following the wire on it's way towards the front of the truck, but I quickly loose sight of the wire as more branches enter into the wiring harness. Where does this wire end? Does it terminate in the engine compartment, at the instrument cluster, somewhere else?
I just can't figure out how to narrow down where the break in the wire might be. Or am I chasing down the wrong root cause?
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Okay, my 1986 f150 with a 351w (non-feedback carbed) Has no lights on the cluster, and none of the gauges work (haven't tested the speedo yet, truck is not registered yet).
I also have a minor issue with the turn signals... Fronts work, no rears. The left turn indicator light on the dash does not come on but the right turn one does. All my "primary lights" (markers, tail, headlights) work fine. I have not yet tested the brake lights.
Fuses all look good, truck did have some roof leaks. I've done some research, does this sound like the dreaded voltage regulator issue for the gauges?
My assumption for the left turn indicator light is that there is a replaceable bulb in the dash (probably blown), is that right? Rear signals might be wiring (PO installed his own trailer wiring) or bulbs? haven't gotten that far into it yet...
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Looking for a wiring diagram for a F-150 XLT LARIAT 5.8L 4BBL, all the books I have looked at show the wiring for this year with fuel injection and this truck came with a 351W with a Holley 600 4BBL, I have a few wire's in the engine compartment that melted away all the insulation, they are located close to where the harness passes the firewall before the ignition module. Is this a common problem on old models ?. Need a clear copy of the correct diagram for a f-150 1987 with carburetor, how I can get a copy so I can fix this problem before it gets worse.
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2005 Ranger XL 2.3L 5 speed 2WD 305,000 miles. Alternator has about 100,000 miles on it.
Battery light came on about 0400 and 50 miles into my daily 90 mile drive to work, made it to work. After the truck cooled down for 3 hours and I got time I checked the battery voltage 12.6VDC and started the engine and the system is charging at 14.2VDC with no battery light on (battery light out when cold). Serpentine belt looks good, dry weather.
Other than alternator nearing end of life and being warm is there anything else that may cause battery light to come on.
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I am trying to add courtesy lights to the existing reflectors in the front doors of my supercab. I can't find a wiring diagram that shows where to connect the light sockets. 1999 F250 SD...
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I have an 02 Ranger 4.0 4WD and I have been doing a lot of research to try and figure out why the battery light comes on and off. I was driving the other day down the highway and the battery light came on and voltage gauge dropped. Drive a little further and it goes off, go down hill light comes on, up hill it turns off. (The up and down hill part was probably just a coincidence!) ...
Next day I pulled the alternator and had it tested at O'Reillys and it passed no issues. Yesterday I was driving again the light comes on my way home from the store and stays on for about 3 miles til I got home. Turned my truck off, restarted it later, no light. Today I drove around for a while and about 45 minutes into my driving around the light comes back on and voltage gauge drops and after about a mile it turned off. I stopped by O'Reillys again to have them test the complete charging system and everything passed. On the way home, light comes on again!
So, question is, the battery light was not on when they tested, will that make a difference in the outcome of the tests? I'm guessing not??? Belt looks good, no bad connections that I have found, battery was good...what am I missing? Battery light is still on and voltage low when I start truck after 1.5 hours of being home. Also, I get no magnetism from the alternator when the battery light is on.
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The battery light is on in my dash. To test it I probed the car battery with a multimeter. Car off the battery reads 12.5 volts. With the car running and no headlights on, heater fan off, etc the meter reads 15-15.5volts. When I turn everything electrical I can think of on the meter reads 14-14.5volts. Is this normal or is the second scenario overcharging the battery? What else can I test that may be keeping the battery light on in the dash?
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I have a '97 F250 diesel and the battery light keeps coming on and off. The volt meter shows a good charge. How do I fix this?
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So I get in my X today and she fires right up as usual... Then the battery light started blinking then stayed on... Then I hear a click and all my stock gauges go out my window and lock switches don't work and my radio doesn't work... Battery light stays on and all signals work as do the mirrors and everything else... I turn the truck off then back on it all comes back on.. 15-20 seconds later I hear the click and all the same stuff is off again.... No seemingly applicable fuses are blown... And the behavior is repeatable...
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98 Ford Expedition 4.6L, 198K Miles, New Battery, Alternator replaced, but battery light still on and after a minute charge indicator drop until left indicating zero, temp gauge on top while temperature motor is cold, gas gauge drop, when lights are turned on oil light turn on also check engine both for a few of seconds.
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Here's the breakdown. I have a '95 Ford F150 that I bought the previous year and it has been nothing but a problem. The most recent problem is the attempt to turn on the headlights. I will pull the plunger to turn on the headlights but I will only get the parking lights and when attempting to turn on the high beams I still get nothing. The only way that I get any sort of lighting is if I pull on the turning stick (almost like doing a manual override on a tripped wall plugin). Now here's the kicker. I still have parking lights, brake, tail, cab, and dash lights. Winter in quickly approaching and the nights are already getting dark, pretty soon the days will be just as dark.
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